Phegopteris connectilis
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- (Dryopteris Expansa) C. Presl Fraser-Jenkins & Jermy
- National Park Service U.S
- Ferns of the National Forests in Alaska
- BROAD BEECH FERN (Phegopteris Hexagonoptera) in Ontario
- Nbfs Lille Bregnebok De Leptosporangiate Bregnene
- Thelypteridaceae (PDF)
- Vascular Flora of the Penobscot Experimental Forest, with Provisional Lists of Lichens and Bryophytes
- Apomixis, Hybridization, and Biodiversity in Ferns: Insights from Genera Phegopteris and Polystichum Nikisha Patel University of Vermont
- The Rugg's Fern Enigma
- Reproduction and Hybridization in Ferns
- HARDY FERN FOUNDATION QUARTERLY the HARDY FERN FOUNDATION QUARTERLY Volume 25 NO